Examine source code of Wplace Live

{
  "manifest_version": 2,
  "name": "WplaceLive Helper",
  "version": "1.0",
  "description": "Quick access to WplaceLive.live",
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://wplacelive.live/*"
      ],
      "js": [
        "content_script.js"
      ],
      "css": [
        "content_style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "wplacelive-helper@example.com",
      "strict_min_version": "91.0"
    }
  }
}